Acorn 6809 CPU

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From an advert Practical Computing in April 1980:

"For existing owners of Acorn Systems, the 6809 CPU card is a direct plug-in replacement for the 6502 CPU for those who wish to upgrade their system to make use of the advanced facilities of Motorola's most powerful 8-bit processor the 6809, and can be used with all the supporting cards presently consisting of 8K memory, tape interface, VDU interface, Floppy disc drive, Analogue to digital/digital to analogue and Universal interface.

For newcomers the two card system can readily be linked to terminal printers, etc, the operating system firmware is designed for modularity and has disc bootstrap."

  • 1K RAM
  • Direct printer drive
  • ASCII keyboard input
  • Fully buffered address and data bus
  • 2K operating system with Printer routine, VDU routine, Cassette load and save, Disc bootstrap, Trace, All usual debug facilities"

The User's Manual for the Acorn 6809 is available here.

Date : 1980

Manufacturer : Acorn

Format : Expansion Board

Physical Description : Expansion board.

This exhibit has a reference ID of CH49719. Please quote this reference ID in any communication with the Centre for Computing History. 		 

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